<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>absolute</title>
    <style>
        div {
            width: 100px;
            height: 100px;
        }
        .absolute {
            position: absolute;
        }
        .blue {
            width: 200px;
            height: 200px;
            background-color: blue;
            top: 208px;
            left: 208px;
        }
        .yellow {
            background-color: yellow;
            top: 50px;
            left: 50px;
        }
        .red {
            background-color: red;
            top: 100px;
            left: 100px;
        }
        .green {
            background-color: green;
            top: 300px;
            left: 300px;
        }
        .black {
            background-color: black;
            width: 50px;
            height: 50px;
            top: 50px;
            left: 50px;
        }
        .blue_margin {
            width: 200px;
            height: 200px;
            background-color: blue;
            margin-top: 200px;
            margin-left: 400px;
        }
    </style>
</head>
<body>
    <div class="blue absolute">
        <div class="red absolute"></div>
        <div class="yellow absolute">
            <div class="black absolute"></div>
        </div>
        <div class="green absolute"></div>
    </div>
    <div class="blue">
        <div class="red"></div>
        <div class="yellow"></div>
        <div class="green"></div>
    </div>
    <div class="blue_margin"></div>
</body>
</html>
